/Engine/Plugins/BlueprintFileUtils/Source/BlueprintFileUtils/Public/BlueprintFileUtilsBPLibrary.h
Finds all the files within the given directory, with optional file extension filter.
true if anything was found, false otherwise
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="FileUtils") static bool FindFiles ( const [FString](API\Runtime\Core\Containers\FString) & Directory, [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & FoundFiles, const [FString](API\Runtime\Core\Containers\FString) & FileExtension )